Rishard Matthews may have gone into Sunday looking like the odd man out for the Dolphins, but he came out of Day 3 of training camp as one receiver who stood out. Matthews made a series of catches to become the unofficial star of a workout held before a fairly intimate invitation-only crowd at Nova Southeastern University. But it was one play he didn’t make that had everyone buzzing. Matthews made a diving attempt at a one-handed catch over Brent Grimes that would have been the play of camp. Instead, it prompted a debate among reporters over whether officials working the practice credited Matthews with the catch. Many fans believed Matthews maintained control on the way down, but ultimately, the Dolphins confirmed, it was incomplete. Still, Matthews came back with several other receptions to gain notice. This happened on a day when Brandon Gibson, returning from a knee injury, was unable to finish practice. Matthews can use all the reps he can get, given that the Dolphins carried only four wide receivers into last season and the position currently is 14 deep, including at least three locks to make the roster (Mike Wallace, Brian Hartline, Jarvis Landry). Misi leaves early: Koa Misi, playing middle linebacker for the first time, left practice early and iced his left foot. Coach Joe Philbin seems pleased with the shift of Misi from the outside, where he is flanked by Philip Wheeler and Dannell Ellerbe. “I like their play speed,” Philbin said of the trio. “I thought they’ve been doing some things downhill, a little bit faster.”